Star Chart: the sky on any date

When

Where

°N °E

Layers

Names

Dome

Grid

Gold ticks along the ecliptic: 27 nakshatras and 12 rashis on the Lahiri sidereal scale, shifted by the ayanamsha of the chart's date.

The sky now

Selected

Click a star, planet or satellite.

Satellites

Switch on the Satellites layer to load orbital elements.

Drag to pan, scroll or pinch to zoom, double-click to reset. ←→ step, space play, N now, 123 views.
Planets: Standish elements; Moon: Meeus; precession IAU 2006; checked against the Swiss Ephemeris. Earth's rotation is only known statistically before 1600 CE (ΔT is extrapolated): the sky can be off by roughly 3° east-west at 1000 BCE, 8° at 3000 BCE and 16° at the Rama preset's date. Altitudes are geometric (no refraction); nutation and aberration are ignored.
Stars: HYG Database v4.1 (CC BY-SA 4.0, astronexus); figures, names and Milky Way: d3-celestial (BSD-3). Satellites: CelesTrak elements, SGP4 by satellite.js. Linear proper motion, so figures far from J2000 are approximate.